Building board



FIG. 1 is a front elevational view of a building board showing my new design.

FIG. 2 is a left end elevational view thereof.

FIG. 3 is a right end elevational view thereof.

FIG. 4 is a top plan view thereof.

FIG. 5 is a bottom plan view thereof.

FIG. 6 is a perspective view thereof.

The panel rear is plain and flat. 

The ornamental design for a building board, substantially as shown and described. 